PMID: 20134249Feb 6, 2010Paper

Structure and diversity of arsenic resistant bacteria in an old tin mine area of Thailand

Journal of Microbiology and Biotechnology
Pechrada JareonmitM J Sadowsky

Abstract

The microbial community structure in Thailand soils contaminated with low and high levels of arsenic was determined by denaturing gradient gel electrophoresis (DGGE). Band pattern analysis indicated that the bacterial community was not significantly different in the two soils. Phylogenetic analysis obtained by excising and sequencing six bands indicated that the soils were dominated by Arthobacter koreensis and proteobacteria. Two hundred and sixty-two bacterial isolates were obtained from arsenic contaminated soils. The majority of the As resistant isolates were gram-negative bacteria. MIC studies indicated that all of the tested bacteria had greater resistance to arsenate than arsenite. Some strains were capable of growing in medium containing up to 1,500 mg/l arsenite and arsenate. Correlations analysis of resistance patterns of arsenite resistance indicated that the isolated bacteria could be categorized into 13 groups, with a maximum similarity value of 100%. All strains were also evaluated for resistance to eight antibiotics. The antibiotic resistance patterns divided the strains into 100 unique groups, indicating that the strains were very diverse. Isolates from each antibiotic resistance group were characterized in more...Continue Reading

Citations

Jun 18, 2011·Journal of Industrial Microbiology & Biotechnology·Young C ChangShintaro Kikuchi
Jul 19, 2012·World Journal of Microbiology & Biotechnology·Pechrada JareonmitKannika Sajjaphan
Apr 17, 2014·Environmental Science and Pollution Research International·Charlotte C ShagolTongmin Sa

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